Lock device



l at'ented Nov. 18, f

SELLDEN 'J. eoonwnv, or" shN rmncrsco, OALIFORN1A, I 3

LOCK nEvrcE,

Application men September i7, "i928. sermrm, '3oe,3s3.*

'This invention relates todoor locksof the.

spring latch bolt type and hasfor its objects the provision ofguard'means whereby the bolt cannot be opened by an unauthorized personthrough the use of a thin tool or sheet of material to force back. thebolt.

Briefly described my invention comprises applying to the bolt socket ofa a common striker plate an automatically projecting guard of sheetmetal so arranged that the bolt is inaccessible from thefront of thedoor as well as from above and below the.

bolt. In the drawings accompanying this applistriker plate as used onthe jamb of a door to receive the latch bolt.

Fig. 2 is a plan view of my'guard which plate of Fig. 1. r v a Fig. 3 isan end view of .the'device of Fig. 2. e V

Fig. 4 is a bottom view of the device of Fig. 2. V i Fig. 5 is aperspect've view of the inner or adjustable member of the device shownin Figs. 2, 3 and 4.

Fig. 6 is an elevation of the plateof Fig.

1 fitted to a door j amb and with my device in position within thesocket in the jamb and late. p Fig.7 is a cross sectionof a bolted doorand jamb taken at a point just above the latch bolt of the door lock,with my invention in place and showing the relationof my guard to'thedoor and jamb.

In-the common method of installing springv locks in doors, a bolt orstriker plate lis counof the lock merely snaps into place in the socket3 of the plate.

The door 4 (Fig. 7) is supposed to close against a stop piece usually a,separate strip 5 nailed to the jamb 2, but in practice there is "nearlyalways an appreciable crack or clearanceas at 6, and also at 7 betweenthe side of the door and the jamb, and it is by reason of this that anunscrupulous person'can easily open a spring bolted door of this type,as the "bolt 8 of the lock 9 has a beveled-face at8' cation Fig. 1 is anelevation of a common is adapted to fit within the socket of the 7,

vertical edge'of the socket'3 of the common strikerpl'ate'landpreferably adjustable in or x outf-of thejamb so that-itsvertical-lw'all may:

tersunk into the jamb 2 of a door and the bolt and-if a sheet ofcelluloid'or the likeis pushedboltand force same back into the look sothat the door may be opened. Or insteadof the celluloid-'a' thin blademay lie-forced between;

- intotheZclearancefGit will follow over into I the clearance 7, reachthe beveledface of-the j e V the stop 5 and j amb'2 along thej oint 10:until Y it reaches andfforces downthebolt.

Prior attempts made'toovercome/this weakness insprlng'locks becameconcentrated,

on" blocking the passage of an instrument thro'ugh the joint 10 but havenot considered the passageflmost always present at 6, nor have prior'devices guarded the lat'ch 'from 'ac-" V ces'sibility ataslant froma'boveor below. 'My-invention comprises a sheet metal guard consistingof an inner member 11 adapted 'to' be'positionedwithin' and forming anoutwardly projecting wall attop, bottom-and one' I be made to just touchthe face of the lock 9 when the door is closedasindicatedat 11 inFig .7.i

The adjustability of member 11 may be effected-in various ways but ishere shown ace complished by pivoting the inner member at 7 12 to smallears 13 extending from 'a plate or frame 14 which, when in place on thejamb, is

' let into the wood flush with theundersideo'f the striker' plateandextendingbeyond the hole 15 cut in the wood for the bolt toprodrilled through plate 1 just over the screw 17*soth'at it 'canbereached- -with out: removing plate '1. End wallsll on the inner 'memberalso project outwardly to the lock above and belowthe bolt." i

With the arrangement described the latch bolt'is i-guarded fromaccessibility from its beveled side as well as top and bottomb'y a metalwall projecting at right angles'from the striker plate and substantiallyin contact with the metal mortised face of the'lock itself, thusrendering the bolt proof against tampering by insertion of tools throughpassages 6, 7 or 10, or evenif stop piece 5 was forcibly ripped off byone seeking to open the bolt.

From the abovedisclosure it will be manifest that walls like 11 and 11;integrally} formed with striker plate 1 and projecting from the edge ofits bolt opening or socket '3 will also form a-}gnard-asdesiredtl'iougli they would not be adjustable to care ,for

shrinkage of doors and jambs as does the' complete arrangement shown ainthe; draw ings, and therefore any such modifications as co'mezwithin thespirit of the'invention are intended to be embraced in the appendedclaims. V

I claim:

1. In combination with adoor-lock having provided with a wall projectingthrough said opening, and means whereby said device may be adjustedrelative to said frame and plate to vary the projection of said wallfrom the face of said plate.

a 6. In a structure as specified in claim 5, said wall'extending alongone edge of said opening and fora distance along its two ends.

7 A striker plate having an opening to re- 7 provided with a wallprojecting through said opening, said device being pivotally mounted onsaid frame, and a screw connecting the "frame an'd'de'vice arrangedand-adapted for adjustingithe frame and device from thejpivotalmounting. I

, a f 8mm"; eoobwm ceive the latch bolt of a lock, a frame positione'dunder-said plate,' a bolt guard device said Wallextending along onevertical edge of saidopening adjacent-the beveled side of the bolt. a

.2. In combination with adoor lock having its outer face in one plane, aspring bevelsided bolt adapted to engage the edge of an opening inajstriker plate, arigid wall projecting outwardly fromsaid striker plateguarding the bolt when engaged with the plate of aheight to take up thenormal clearance between lock and plate when the door is hung andsubstantially touching the face of the lock exposed at the edge of thedoor,

7 said wall extending along one vertical edge I of said opening pastthebeveledside of the bolt and for a distance along the upper and loweredges ofsaid opening.

3. In combination with a door lock having a spring bevel-sided boltadapted to engage the edge of an opening in a striker plate, a

rigid wall projecting outwardly from .said

striker plate guarding the bolt when engaged with-the plate, andmeanswhereby said wall is adjustable in its projection from said plateadapting the wall to be brought into contact vwith the face of the lockexposed at the edge of the door when the bolt and plate are, en-' gaged.I ff. A striker plate having an opening to receive the latch bolt of alook, a device under said, plate provided with a wall projectingoutwardly through said opening extending along one side and both endsthereof. v 5. A striker platehaving an opening to re-. ceivejthe latchbolt of alock, a frame positioned under said plate, a bolt guard devicev nc

